KR950008918Y1 - Decrease devices for edge temperature deviation - Google Patents

Abstract

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Description

Edge deviation reduction device at the edge of high tensile steel during accelerated cooling

1 is an external perspective view showing the overall structure of the edge portion temperature deviation reduction device according to the present invention.

2 is a cross-sectional view taken along the line AA ′ of FIG. 1.

3 is a cross-sectional view taken along the line B-B 'of FIG.

4 is a cross-sectional view taken along the line C-C 'of FIG.

5 is a detail view of the "D" part of FIG.

6 is a block diagram in which a fixed water barrier device according to the prior art is mounted to a spray nozzle.

7 is an operating state of the fixed water barrier device according to the prior art.

8 is a plan view of the conventional stationary clapper device shown in FIG.

* Explanation of symbols for main parts of the drawings

10: support 20a, 20b: feed screw shaft

21a, 21b: connecting rods 30a, 30b: mobile plant barrier

40: drive motor 42: drive sprocket

45: chain 50: automatic control unit

N: Spray Nozzle

The present invention relates to a device for preventing defects such as deformation and segregation of edge parts due to accelerated cooling during the production of high strength steel (TMCP), which is a thick plate product. More specifically, the amount of cooling water according to the width of high tensile steel The present invention relates to a device for reducing the edge temperature deviation during accelerated cooling of high tensile steel to prevent defects on both sides by uniformly distributing the same.

In the conventional accelerated cooling apparatus, as shown in FIGS. 6 to 8, 28 upper and lower sprayers (No. 1 to 28) are installed between the plurality of roller tables at intervals of 1 m, respectively, and the thick steel plate is cooled. The width of 140 is 1500-4600mm so that the masking effect can be equalized according to the width of the thick steel plate 140 and the number of sprayers (No. 1 ~ 28) out of 28 sprayers (No. 1 ~ 28) is increased to increase the degree of freedom of masking strength control. The length of the upper and lower sprayers (No. 1 to 8) which are poured in the advancing direction of the thick steel plate 140 of the upper and lower sprayers (No. 1 to 8) to the first is gradually widened, and is shown in FIG. The fixed water barrier 110 is disposed, which is shown in Table 1 as an example.

TABLE 1

In the fixed water barrier 110 installed as shown in Table 1, the upper and lower fixed water barriers 110 used in accordance with the width or thickness of the thick steel plate 140 are selectively injected.

In addition, according to the change of cooling conditions, the upper and lower fixed water barrier 110 gave a degree of freedom of a masking pattern so that a suitable number of injections could be made between 1 and 4, which is provided on both sides of the thick steel plate 140. Branch masking length is to select the masking to each 100-400mm, generally two or more fixed water barrier 110 to mask the length of the masking length on each side of the thick steel plate 140 to 200mm respectively Is the most desirable. Therefore, when describing the fixed water barrier that is selectively injected in accordance with the width or thickness of the thick steel plate 140, since the defect does not occur in the edge portion of the thick steel plate 140 of 1800mm or less width will be omitted, and the width of 2000mm When the thick steel plate 140 passes through the roller table, water is pumped only in the first fixed water barrier 110a. If the width is 2200 mm, only the first and second fixed water barriers 110a and b are flushed. 110a) stops and at the same time only water in the second and third fixed cladding (110b, c), if the width of 2600mm, the second fixed cladding (110b) is stopped and at the same time, only water in the third, fourth fixed plant (110c, d), 2800mm If the width of the third fixed water barrier (110c) is stopped and at the same time only the fourth, fifth fixed water barrier (110d, e) and the water, 3000mm if the width of the fourth fixed plant (110d) is stopped and at the same time the fifth, six fixed water barrier ( Number of weeks only at 110e, f), 5th fixed if width of 3200mm Water stop 110e stops at the same time water only in 6th and 7th fixed water stops 110f and g, and when the width is more than 3400mm, 6th fixed water stop 110f stops and water only in 7th and 8th fixed water stops 110g and h. Although it can be made, this is not limited to watering according to the width of the thick steel plate 140 with two fixed water barriers.

Firstly, due to the temperature difference of the upper and lower plates due to the two stage heat flux during rapid cooling of high tensile steel (TMCP), deformation of the edge part occurs and secondly, the width of the high tensile steel (TMCP) is changed due to the fixed type of water blocking device. Since it is not variable according to the edge (EDGE) deformation and heat treatment efficiency was deteriorated.

The present invention was devised to solve such a conventional problem, and the edge portion temperature deviation that can produce high tensile strength steel with excellent heat treatment effect by changing the position of the water blocking device to prevent the overcooling of the edge portion, and prevent deformation The purpose is to provide a reducing device.

In order to achieve the above object, the present invention extends in the width direction of the spray nozzle in the apparatus for preventing the occurrence of defects, such as deformation and segregation of the edge portion due to accelerated cooling during the production of high-strength steel (TMCP), a thick plate product And a plurality of feed screw shafts are rotatably mounted to the inside of the support, and a movable water barrier is screwed to the feed screw shaft to move forward and backward along the feed screw shaft. On one side, a drive motor is mounted and mounted to rotate the feed screw shaft through the chain and the sprocket, and the drive motor has a PLC controlling the forward and reverse rotation operation of the drive motor according to the width of the high tensile steel to be cooled. Do not reduce the edge temperature deviation device during accelerated cooling of high-strength steel, characterized in that the automatic control unit is electrically connected. As it depends.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The edge support temperature deviation reducing device 1 of the present invention has a support 10 extending in the width direction of the spray nozzle N, as shown in FIG. 1 as a whole. A plurality of feed screw shafts (20a, 20b) is mounted so as to be rotatable, the moving plant membranes (30a, 30b) are mounted to each of the feed screw shafts (20a, 20b) are screwed, the support (10) One side of the drive motor 40 is mounted to rotate the feed screw shaft (20a, 20b).

And the drive motor 40 is electrically connected to the automatic control unit 50 is configured to adjust the forward, reverse rotation of the drive motor 40.

The support 10 extends long over the full width of the first to 12th spray nozzles N, and the guide members 12a and 12b of each support 10 are concave guide grooves on the inner side thereof. (13a) and (13b), and the guide members (12a) and (12b) are connected to each other as reinforcing bars (14a) and (14b) in the middle portion, and the pair of feed screw shafts in the reinforcing bars (14a) and (14b). It has a structure that is connected through the (20a) (20b). In addition, both side ends of the guide members 12a and 12b are firmly connected to each other by side plates 16a and 16b, respectively. The pair of feed screw shafts 20a and 20b rotatably mounted to the support 10, respectively, includes leftward screw portions 22a and 22b having one end portion coupled to each other by connecting rods 21a and 21b, respectively. The right-side screw portion 24a, 24b is provided, and the left-side screw portion 22a and the right-side screw portion 24a are fitted to both end portions of the connecting rod 21a and connected by pins P, and the left-side screw portion 22b and the right-side screw portion 24b is fitted by both ends of the connecting rod 21b, and is connected by pin P. As shown in FIG.

Then, the left end portions of the left-hand screw portions 22a and 22b of the feed screw shafts 20a and 20b are rotated on the bearing blocks 26a and 26b mounted to the side plates 16b as shown in FIG. The other end of the right-side threaded portion 24a, 24b passes through the bearing blocks 28a, 28b of the side plate 16a, respectively, as shown in FIG. Equipped with.

In addition, the movable plant membranes 30a and 30b respectively mounted on the feed screw shafts 20a and 20b have a box-type structure in which an upper surface and an outer surface are open, and fixing nuts 32a are disposed at both lower sides of the front and rear sides. (32b) and (34a) and (34b) are screwed together, the movable water barrier (30a) is fixed nuts 32a, 32b is coupled to the right-side screw portion (24a, 24b), respectively, the removable water barrier (30b) Is

Fixing nuts 34a and 34b are coupled to the leftward threading portions 22a and 22b, and the concave guide grooves 13a and 12b of the guide members 12a and 12b above the side surfaces of the movable water barriers 30a and 30b. As the 13b), the circular rods 37a and 37b are protruded so as to sandwich the pulleys 36a and 36b, respectively.

In addition, the drive motor 40 for forward and reverse rotation of the feed screw shafts 20a and 20b is equipped with a drive sprocket 42 on a rotating shaft (not shown), and the drive sprocket 42 and the feed screw shaft ( The sprockets 29a and 29b of the 20a and 20b are connected as the chain 45, and the automatic control unit 50 is electrically connected to the drive motor 40 so that To control reverse rotation.

In addition, the automatic control unit 50 receives production information from a previously installed facility control computer (SCC) and controls the rotary encoder (52) according to the width and thickness of the high tensile force (TMCP) driving motor 40 Is equipped with a PLC (PLC) for controlling the rotation direction and the number of revolutions of the motor, and a cam limit switch (Cam Limit) for controlling the upper and lower limits of the reduction gear (54) for adjusting the rotation speed of the driving motor (40). Switch) 56 or the like, the drive motor 40 is automatically controlled.

Reference numeral 60 is a bolt for coupling various components.

According to the present invention configured as described above, the PLC of the automatic controller 50 receives the information of the high tensile strength TMCP from the facility control computer SCC, determines the rotation speed through the rotary encoder 52, and then drives the drive. The motor 40 is driven to rotate.

Accordingly, the drive sprocket 42 of the drive motor 40 is rotated, the chain 45 is rotated to rotate the sprockets 29a and 29b to rotate the feed screw shafts 20a and 20b, and the feed screw shaft ( 20a, 20b rotates the left and right screw portions 22a, 22b, 24a and 24b to move the movable water barriers 30a and 30b mounted thereon on the feed screw shafts 20a and 20b. , Rotate right. In this case, since the movable water barriers 30a and 30b are coupled to the left and right screw parts 22a, 22b, 24a and 24b, the coolant drops from both ends of the spray nozzle N by moving in opposite directions. It does not fall to the edge portion of the high-tensile steel, but is discharged to the outer surface through the upper open surface to prevent falling directly to both edges of the high-tensile steel.

The position control method of the related movable water barrier will be described in detail.

Here, the position control inputs and modifies the number of rotations of the rotary encoder 52 according to the dimensional change of the high tensile steel width on the PL in order to drive the machine in the PLC (see Table 2). In addition, if the actual operation is explained based on the width of the high tensile steel of 2000 mm and the spray nozzle No. 1, P.L. remembers the position of the movable water barrier before cooling, and if the width of the preceding high strength steel and the cooling trailing high tensile steel is different, 500mm water is blocked by EDGE part and 40mm wide water is sprayed in order from sprayer nozzle No. 2 to 12. In this case, as a safety device, a rotary cam switch is used to prevent detachment of the movable water barrier. (56) is attached.

TABLE 2

Edge part position

According to the present invention as described above according to the temperature difference of the upper and lower surfaces of the high tensile strength steel (TMCP) by driving the upper and lower nozzle block 2 alone to solve the two-stage heat flux problem and the change in the width of the high tensile steel (TMCP) It is to obtain a practical effect of varying the water barrier (2) device to prevent deformation of the edge portion and to maximize the heat treatment effect.

Claims (1)

In the apparatus for preventing the occurrence of defects such as deformation and unevenness of the edge part due to accelerated cooling during the production of high strength steel (TMCP), which is a thick plate product, it is provided with a support (10) extending in the width direction of the spray nozzle (N), The inner side of the support 10 is mounted so as to be rotatable a plurality of feed screw shafts (20a, 20b), removable water barriers (30a, 30b) are screwed to the feed screw shaft (20a, 20b) Along the feed screw shaft (20a) (20b), it is possible to move forward and backward, the drive motor 40 is mounted to one side of the support (10) chain 45 and the sprocket (42) (29a) ( 29b) is mounted to rotate the feed screw shafts 20a and 20b, and the drive motor 40 controls the forward and reverse rotation operation of the drive motor 40 according to the width of the high tensile steel to be cooled. Accelerated cooling of high tensile strength steel, characterized in that the automatic control unit 50 having a PLC (PLC) is electrically connected Device for reducing temperature deviation at the edge.